Constante predefinite

QuickHashIntStringHash::CHECK_FOR_DUPES

If enabled, adding duplicate elements to a set (through either add() or
loadFromFile()) will result in those elements to be dropped from the
set. This will take up extra time, so only used when it is required.

QuickHashIntStringHash::DO_NOT_USE_ZEND_ALLOC

Disables the use of PHP's internal memory manager for internal
set structures. With this option enabled, internal allocations will not
count towards the memory_limit settings.

QuickHashIntStringHash::HASHER_NO_HASH

Selects to not use a hashing function, but merely use a modulo to
find the bucket list index. This is not faster than normal hashing, and
gives more collisions.

QuickHashIntStringHash::HASHER_JENKINS1

This is the default hashing function to turn the integer hashes
into bucket list indexes.